Question Bank 2021 - 22 - WCC - 8th - SEM
Question Bank 2021 - 22 - WCC - 8th - SEM
Question Bank 2021 - 22 - WCC - 8th - SEM
CREDITS - 03
Course outcomes
CO1: Interpret the Communication theory both Physical and networking associated with
GSM, CDMA and LTE 4G system.
CO3: Develop a scheme for idle mode, call set up, call progress handling and call tear
down in a GSM cellular network.
CO4: Develop a scheme for idle mode, call set up, call progress handling and call tear down
in a CDMA cellular network.
Reference Books:
1. “Wireless Communications: Principles and Practice” Theodore Rappaport, 2nd Edition,
Prentice Hall Communications Engineering and Emerging Technologies Series, 2002,
ISBN 0-13-042232-0.
2. LTE for UMTS Evolution to LTE-Advanced’ Harri Holma and Antti Toskala, Second Edition
- 2011, John
QUESTION BANK
Fading and Multipath – Broadband wireless channel, Delay Spread and Coherence Bandwidth, Doppler
Spread and Coherence Time, Angular spread and Coherence Distance (Text 1 – 2.4) ,
Statistical Channel Model of a Broadband Fading Channel (Text 1 – 2.5.1)
The Cellular Concept – Cellular Concept, Analysis of Cellular Systems, Sectoring (Text 1- 2.3)
Mobile Radio Propagation : Large Scale Path Loss
Introduction to Radio wave propagation, Free Space
Propagation Model
2 Find the far-field distance for an antenna with maximum 04M MQP CO2 L2
dimension of 1 m and operating frequency of 900MHz.
4 Explain the Relating Power to Electric Field used in Mobile 06M MQP CO2 L2
Radio Propagation.
9 A mobile is located 5 km away from a base station and uses 06M MQP C02 L3
a vertical monopole antenna at a gain of 2.55 dB to
receive cellular radio signals.
(b). Find the received power at the mobile using the two Ray
ground reflection model assuming that the height of the
transmitting antenna is 50m and the receiving antenna is
1.5 m above the ground
11 Explain the concept of scattering used in mobile radio 06M MQP CO2 L2
propagation-large scale path loss.
12 Explain the practical link budget design using path loss 08M MQP CO2 L2
models OR
(a). find the minimum mean square error estimate for the
path loss exponent, n
(b). calculate the standard deviation about the mean value;
(c) estimate the received power at d= 2 km using the
resulting model;
(d). predict the likelihood that the received signal level at 2
km will be greater than -60 dBm; and
(e)predict the percentage of area within the 2 km radius cell
that receives the signals greater than -60 dBm given the
result in (d).
14 What are the techniques used for mitigating broad band 08M Aug CO2 L2
fading? Explain /Sep.2020
20 Explain the techniques used for mitigating narrow band 08M Nov 2020 C02 L2
fading.
Module-2
GSM and TDMA Technology
GSM System overview – Introduction, GSM Network and System Architecture, GSM Channel Concept.
GSM System Operations – GSM Identities, System Operations –Traffic cases, GSM Infrastructure
Communications (Um Interface)
(Text 2, Part1 and Part 2 of Chapter 5)
Introduction to GSM
2 With neat GSM network architecture, explain the Network 10M June /July CO3 L2
switching system (NSS). 2014
3 With a neat block diagram, explain different protocols used 10M Dec.2016/ CO3 L2
in GSM Signalling model OR Jan2017
(10EC81)
Explain GSM Signalling model OR
10M June /July
Describe GSM protocols and signalling model with neat 2016
diagram 10M
June /July
2015
GSM Channel Concept, TDMA Frame
4 Classify and name GSM logical channels and explain their 10M Dec.2015/ CO3 L2
major functions. Jan2016
5 Draw and describe the structure of TDMA frame, 10M Dec.2015/ CO3 L2
multiframe, superframe and hyperframe. Specify their time Jan2016
lengths.
6 Explain the various logical channels used in GSM. 10M June /July CO3 L3
2015
7 Draw and explain GSM TDMA frame with logical channel 04M Dec.2016/ CO3 L2
Jan2017
(10EC81)
8 With suitable diagram, explain GSM channel concept. 10M June /July CO3 L2
2014
System Operations –Traffic cases, Handover
9 Explain the steps in the call setup in GSM using mobile 10M June /July CO3 L2
station roaming number 2016
diagrams.
11 List out the ten operations in call setup in GSM system. 10M June /July CO3 L2
Explain in details ciphering mode setting and IMEI check. 2016
OR June /July
2014
List the different call setup operations and with flow diagram
10M Dec.2016/
interrogation phase and IMEI check operations. OR Jan2017
Describe GSM ciphering mode setting operation and IMEI (10EC81)
check.
10M
12 List different call setup operations. Explain interrogation 10M June /July CO3 L2
and radio resource connection operations with a neat flow 2015
diagram
13 Explain Intra BSC Handover in GSM, with neat figure 08M Dec.2015/ CO3 L2
Jan2016
Dec.2016/
Jan2017
(10EC81)
14 Explain GSM inter BSC handover operation with neat 10M June /July CO3 L2
diagram 2015,
2014
15 With neat flow diagram, explain the GSM inter MSC 10M MQP CO3 L2
handover operation.
16 Explain the different layers and protocols used in GSM 10M MQP CO3 L2
Infrastructure Communications (Um Interface)
Module-3
CDMA Technology
CDMA System Overview – Introduction, CDMA Network and System Architecture
CDMA Basics – CDMA Channel Concepts, CDMA System (Layer 3) operations, 3G CDMA
(Text 2-Part 1, Part2 and Part 3 of Chapter 6)
CDMA Technology
CDMA System Overview – Introduction, CDMA Network
and System Architecture
1 Explain Network Nodes in CDMA 2000 wireless system, 12M Dec.2015/Ja CO1 L2
with neat diagram n2016
2 Explain Network interfaces for CDMA systems, with neat 08M MQP CO1 L2
diagram
3 Explain elements of the CDMA 2000 packet core network, 08M MQP CO1 L2
with neat diagram
Module-4
LTE – 4G
Key Enablers for LTE 4G – OFDM, SC-FDE, SC-FDMA, Channel Dependent Multiuser Resource Scheduling,
Multi-Antenna Techniques, Flat IP Architecture, LTE Network Architecture. (Text 1, Sec 1.4)
Multi-Carrier Modulation – Multicarrier concepts, OFDM Basics, OFDM in LTE, Timing and Frequency
Synchronization, Peak to Average Ration, SC-Frequency Domain Equalization, Computational Complexity
Advantage of OFDM and SC-FDE.
(Text 1, Sec 3.1 – 3.7)
LTE – 4G
Key Enablers for LTE 4G – OFDM
1 Discuss the advantages of OFDM leading to its selection for 08M Dec.2019/J CO1 L2
LTE. an.2020
OR 08M Aug./Sept.
2020
Discuss the key enabling technologies used in LTE design.
June/July
OR 2019
Explain the advantages of OFDM leading to its selection for July/Aug
LTE. 2021
SC-FDE, SC-FDMA,
2 With a neat diagram, explain SC-FDMA. List out the 08M Aug./Sept.
advantages and disadvantages of SC-FDM 2020
5 Discuss with the block diagram of IP based Flat Network 08M MQP CO5 L2
architecture.
OR June/July
2019
Explain Flat LTE SAE Architecture.
OR
Explain with a neat diagram, how3GPP network evolved
towards flat LTE-SAE architecture.
LTE Network Architecture
6 Write the block diagram, Explain LTE Network Architecture 08M Nov 2020 CO5 L2
and describe briefly the new elements provided in it. 04M Aug./Sept/
OR 08M 2020
MQP
Give a brief description of evolved packet core architecture
Dec.2019/J
OR 08M an.2020
Discuss with block diagram of LTE Network architecture.
OR 08M July/Aug
Write the block diagram of end to end architecture of EPC 2021
supporting current and legacy Radio access networks and
discuss the elements of EPC.
OR
Explain briefly EPC architecture
7 With a neat diagram explain the LTE end-to-end Network 08M MQP CO5 L2
architecture.
OR
July/Aug.
Explain the basic multicarriers transmitter and receiver 2021
with neat block diagram
12 Discuss the OFDM baseband to pass band transmitter used 08M MQP CO1 L2
in LTE.
13 Apply the circular convolution and DFT to explain the 08M MQP CO1 L2
OFDM Basics.
OR
How cyclic prefix avoids the Inter Symbol Interference (ISI)
in OFDM.
15 With neat sketch, Explain PAR problem and Quantifying 08M MQP CO5 L2
with IFFT equation
OR
Discuss the significance of PAR problem in LTE. Briefly 08M
explain PAR reduction technique.. Aug.Sept.
OR 2020
What is PAR problem? Explain the methods used for PAR
reduction, Nov. 2020
OR
Explain Peak to Average Ratio (PAR).
SC-Frequency Domain Equalization,
16 Explain the comparison between an OFDM system and an 06M MQP CO5 L2
SC-FDE system
OFDMA,
2 Write the block diagram of OFDMA downlink transmitter 06M MQP CO5 L2
and downlink receiver and explain the principle of operation
OR 08M
July/Aug.
Explain the principle of operation of OFDMA downlink
2021
transmitter with neat sketch.
3 Discuss the OFDMA advantages and disadvantages 06 M MQP CO5 L2
SCFDMA
4 Explain SC-FDMA uplink transmitter and uplink receiver 07M Dec.2019/Jan. CO5 L2
2020
with a neat block diagram. July/Aug 2021
OR 07M June/July
2019
Explain SC-FDMA uplink transmitter with a neat figure
5 Discuss the SC-FDMA advantages and disadvantages 06 M MQP CO5 L2
6 Discuss the scheduling and resource allocation in LTE 09M Dec.2019/J CO5 L2
an.2020
7 Explain the Multi-user diversity and opportunistic 08M MQP CO5 L2
scheduling approaches for OFDMA.
10 Discuss the basic design principles followed in designing 08M Aug.Sept.20 CO5 L2
LTE specification. OR 20
Discuss the basic design principles while designing the LTE July/Aug
2021
specifications. OR
Nov 2020
Explain the basic design principles of LTE
11 Explain the LTE Radio Interface Protocols 08M June/July CO5 L2
OR 2019
Explain the LTE Radio Interface Protocol stack Nov. 2020
July/Aug.
2021
Hierarchical Channel Structure of LTE,
12 Explain the different logical channels supported in LTE. 08M Aug.Sept.20 CO5 L2
20
13 Explain the Hierarchical Channel Structure of LTE, 08M June/July CO5 L2
2019
15EC81
14 Explain the transport channels in LTE 08M June/July CO5 L2
2019
15 Briefly explain downlink transport channel. 08M Aug.Sept.2020 CO5 L2
Nov. 2020
OR
Explain uplink transport channel Jul/Aug 2021
OR Jul/Aug 2021
Explain uplink and downlink transport channel
16 Explain the different physical signals in downlink 08M Aug.Sept.20 CO5 L2
20
17 Discuss the Broadcast channel and multicast channels. 08M Dec.2019/J CO5 L2
OR an.2020
Explain Broadcast channel used in LTE July/Aug.
2021
18 Explain control information used in LTE-4G 08M MQP CO5 L2
OR June/July
Explain uplink control information 08M 2019
19 Explain the types of uplink reference signals used in 08M MQP CO5 L2
physical channel. June/July
OR 2019
Explain the types of uplink reference signals
20 With a neat diagram explain the mapping between the 08M MQP CO5 L2
different channel types and mapping of control information
to physical channels.
22 With a neat diagram explain briefly the frame structure 08M Aug.Sept.20 CO5 L2
used in LTE 20
OR Nov. 2020
With a neat sketch, explain briefly the frame structure used
08M
in LTE
23 Write the Frame structure Type 2 and explain the various 08M Dec.2019/J CO5 L2
field’s applications to TDD mode. an.2020
24 Write the Frame structure Type 1 and explain the various 08M Dec.2019/J CO5
fields applications to TDD mode. an.2020
25 Write the structure of downlink resource grid and explain 08M Dec.2019/J CO5 L2
the types of resource allocation. an.2020
26 Write the structure of uplink resource grid and explain the 08M MQP CO5 L2
types of resource allocation.